Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Effect of night break treatment using Red LED (660 nm) on flower bud initiation and growth characteristics of chrysanthemum cv. 'Baekma', and cv. 'Jinba'

적색 LED(660nm)의 광중단 처리에 따른 국화 '백마'와 '신마'의 화아분화 및 생육특성

  • Kwon, Young Soon (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Choi, Seong Youl (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Kil, Mi Jung (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • You, Bong Sik (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Jung, Jae A (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Park, Sang Kun (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
  • 권영순 (농촌진흥청 국립원예특작과학원 화훼과) ;
  • 최성열 (농촌진흥청 국립원예특작과학원 화훼과) ;
  • 길미정 (농촌진흥청 국립원예특작과학원 화훼과) ;
  • 유봉식 (농촌진흥청 국립원예특작과학원 화훼과) ;
  • 정재아 (농촌진흥청 국립원예특작과학원 화훼과) ;
  • 박상근 (농촌진흥청 국립원예특작과학원 화훼과)
  • Received : 2013.11.04
  • Accepted : 2013.11.25
  • Published : 2013.12.31
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Abstract

This study was carried out to examine the effect of Red LED (660 nm) and fluorescent lamp for night break (NB) treatments of each 3 hours (22:30-01:30), 4 hours (22:00-02:00) and 5 hours (21:30-:02:30) per day for 53 days on flower bud initiation and growth in Chrysanthemum cv. 'Baekma' and cv. 'Jinba'. The days to flower budding after short-day treatment in 'Baekma' was longer at fluorescent lamp 4 hr (21.0 days) and 5 hr (20.5 days) NB, and it was shorter at Red LED 3 hr (14.2 days). The days to flowering after short-day treatment in 'Baekma' was longer at fluorescent lamp 4 hr (54.0 days), 5 hr (53.5 days) NB, and Red LED 5 hr (53.3 days), and it was shortest at Red LED 3 hr (50.2 days) NB treatment among all treatments. The days to flower budding after short-day treatment of 'Jinba' was longer at fluorescent lamp 4 hr (20.6 days) and was shorter at Red LED 3 hr (14.1 days) among all treatments. Similarly, the days to flowering after short-day treatment of 'Jinba' was longer at fluorescent lamp 4 hr (55.3 days) and was shortest at Red LED 3 hr (50.2 days) among all treatments. Therefore, inhibition of flower bud initiation was the most effective under fluorescent lamp 4 hr treatment. The length of cut flower of 'Baekma' was increased by fluorescent lamp 4 hr, 5 hr, and Red LED 5 hr, but of 'Jinba' was longer at LED 4 hr and 5 hr treatment. The weight of cut flower of 'Baekma' was heaviest at fluorescent lamp 5 hr treatment and was at Red LED 5hr treatment for 'Jinba' even though there was not statistically significant difference between 'Baekma' and 'Jinba'. Consequently, under fluorescent lamp 4 hr for night break was the most effective on flower bud initiation, flowering inhibition and cut-flower characteristics in 'Baekma' and 'Jinba'.

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References

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